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With the application of modern communication, control and measurement technology based on microelectronics and computer, a large number of microelectronic devices have been applied in the power generation, transmission and production links of power plants. In order to ensure the safe operation of all kinds of electronic equipment, it is necessary to install surge protector (SPD). In this paper, MATLAB...
A novel capacitive power transfer (CPT) structure through self-capacitance routes is proposed in this paper. Selfcapacitance is the nature property of an isolated conductor which represents the amount of charges that have to be added to a conductor to promote its potential by one unit with respect to infinity. By utilizing the self-capacitance effects, one of the two coupling capacitors for conventional...
In order to meet modeling accurately and fault simulation required, according to the working principle of Solid Oxide Fuel Cell(SOFC) Generated Elections System, dividing function module, analyzing which fault modes, building fault mathematical model and verifying model. The result shows the SOFC system fault model reflect the relation among the different module clearly and simulate fault mode effective...
In the view of the complex environment of high altitude areas, a solar chimney power plant experimental setup with a chimney 15 m in height and a collector 15 m in diameter was built. The temperature and velocity of air flow within the collector were tested and analyzed. The results show that the variation of air flow temperature and velocity are similar to the solar radiation. Furthermore, the energy...
In order to improve the safety of the operation of the hydrogen-cooled generator and ensure the stable operation parameters of the hydrogen as the cooling medium, this paper presents a low-cost and high-performance hydrogen quality monitoring system for the hydrogen-cooled generator with ARM microprocessor as the core. The system consists of a data terminal system and a cloud monitoring platform system...
In order to overcome the difficulty of estimating the accurate time delay in the furnace with low and time-varying SNR, the FOC-ETDGE algorithm is studied. The algorithm separates the adaptive processes of SNR and time delay, decomposes the single adaptive filter in the traditional model into the two sub-adaptive units, one of which is used to track the time delay estimate, and the other is used to...
As solid oxide fuel cell (SOFC) systems fueled with natural gas and biogas are applied widely, the capture and utilization of CO2 in SOFC exhaust gas are important issues. This paper proposes a new SOFC system combined with a solid oxide electrolysis cell (SOEC) stack, which absorbs renewable electrical power such as solar power and wind power to convert CO2 in SOFC exhaust gas into fuel by electrolysis...
Microbial fuel cell (MFC) is a device which can convert chemical energy into electrical energy directly, it has great utilization potentiality in the field of environmental monitoring and new energy development. The change of current is used to characterize the change of pollutant concentration. The power density of MFCs is so low and unstable that energyharvesting circuits are needed for real world...
This paper presents a case study application of constrained model predictive control (MPC) strategy with zone control for a coupled flue gas desulfurization system in Yangtze Petrochemical Thermal Power Plant. This desulfurization system can only be operated by manual due to its large inertia, strong nonlinearity and severe coupling between the two desulfurization towers. In this paper, the data reconciliation...
This paper proposes a model free adaptive cascade control scheme for superheated steam temperature regulation, in which a model free adaptive (MFA) controller is designed as the primary controller in the outer loop. The implementation procedures of the proposed cascade control approach are summarized. Simulation results demonstrate that the proposed control methodology achieves better performances...
The structure and working principle of hybrid energy storage system are introduced. The classical RC model of ultracapacitor is analyzed, and the topology of charging and discharging converter of energy storage system is studied. A ultracapacitor-battery hybrid energy storage system model based on bidirectional boost-buck circuit is constructed, and the charging and discharging process of the energy...
Precise Estimation of battery state of power (SoP) is crucial for designing the energy management strategy of power system in electric vehicles (EVs) and hybrid electric vehicles (HEVs). In this paper, a novel online model-based estimation algorithm of SoP is proposed for the lithium-ion battery considering the monotonicity of output power and the influence of battery state of health (SoH). Genetic...
In order to bring the simulation system closer to the actual locomotive run properties, ease to observe locomotive system response in real-time. The fuel cell hybrid locomotive system established in this paper, consists of 150 kW proton exchange membrane fuel cell (PEMFC) power generation system, DC/DC converter, battery energy store system, three-phase asynchronous traction motor, etc. And designs...
Different power grid operation mode corresponds with different short-circuit capacity distribution, while different distribution of short-circuit (current) capacity is contradictory to power grid operation performance and equipment tolerance influence consequence. This paper establishes functional relationship between short circuit (current) capacity of power grid and effective switch set and feasible...
In this paper some measures are taken to effectively weaken the harmonics in the inverter output voltage of low temperature waste heat power generation system with Organic Rankine Cycle (ORC), and to improve the dynamic performance of the system. Firstly, this paper detailed analyzed the harmonic characteristics of bipolar sinusoidal pulse width modulation (SPWM) method. Then the two order low-pass...
Reducing carbon dioxide emissions is an important issue for the environment. The amine-based carbon capture system is a complex system with high energy consumption, and the system needs to be operated flexibly in a wide range. Therefore, advanced control technology is required and an appropriate model is a necessary condition for controller design. To this end, this paper investigates the nonlinearity...
In order to ensure the safe and economic operations of thermal power plants, heater water levels of high pressure (HP) and low pressure (LP) heaters are important process variables to be monitored in industrial alarm systems. This paper proposes multiple factors affecting heater water levels, and the ways performing the root cause analysis for corresponding alarms. Combining with the operating data...
The voltage droop control technology is commonly adopted to control the power sharing between parallel energy storage units in island dc microgrid for its low cost on the control and communication system, but a large number of voltage and current sensors are needed in the traditional droop control method. An improved droop control method for reducing current sensors is proposed. To achieve voltage...
The state monitoring issue of the induced draft fan in a thermal power plant by employing the gravitational searching algorithm optimized BP neural network is investigated in this paper. A new method to estimate the air quantity of the induced draft air of a thermal power plant is proposed based on the historical operation data extracted from the supervisory information system (SIS). In order to predict...
Free-piston Stirling power generating system is a complex coupling system of thermo-mechanical-electrical, the thermo-electrical efficiency of which is affected by many factors. The effect of critical parameters of core components on system efficiency is a main focus, including the regenerator porosity and the change of wire screen diameter on the effect of system, the regenerator changes of flow...
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